Now I saw that I messed things up by not specifying that we play precision ♣ and 1♠ is 10-15...
Guess that I would leave it like that because many people already answered and it is probably not worth another poll.

In reality South ducked and got ruffed for down 1. There were players which said that jumping with the Ace is mandatory for them and I wanted to check what is the opinion here. Not ducking loses only when East has Kxxxxx and we also have 9 card fit so ...

Did not occur to me to Dbl, honestly. Perhaps might have considered it. Reasons for playing Dbl = Penalty is that we have 3♦/3♥ to invite so it might be a useful weapon occasionally. I went overboard bidding direct 4♠, perhaps expecting possible mistakes by the young ...

I bid 3♦ and reached 3NT. Partner had KJ9xx AK8x xx Kx
Lead was J♥ after a hesitation, I won with the Ace unblocking the 9, North won the second ♦ (♦ being 3-2) and played another ♥. Then I decided to play for +1 thinking that the ...